Some aspects of the system units has already been discussed earlier in the blog post

The standard weight of 20 May 1875, representatives of 17 industrialized countries signed a "diplomatic document metric conference." This document manifested the desire to ensure the international unification and improvement of the metric system. Since any measurement made in one country were clear and elsewhere. It is difficult to find another such international document which would act as long. One of its positive rational scc 61 effects would assist in the development and adoption in 1960 of the International System rational scc 61 of Units - SI (SI).
Some aspects of the system units has already been discussed earlier in the blog post "Good physics" (preferably familiar with this). rational scc 61 Note that the dimension of an arbitrary physical quantity reflects its relationship with the values taken for the construction of the main system units. rational scc 61 The International System of Units (SI) includes seven basic units: meter, kilogram, second, ampere, mole and candela kelvin. But there is another system that is widely used in physics - GHS system - the basic units selected by centimeter, gram and second. With the GHS system will peruse later.
Length,
TIME
Kelvin
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One ampere - a force permanent current, which when passing on two straight parallel conductors of infinite length and small cross-section, placed in a vacuum at a distance of 1m from each other, would cause in each section of the conductor length 1m interaction force equal to 2 10 -7 N.
Mole - amount rational scc 61 of substance rational scc 61 is the system that contains many structural elements as contained atoms in the carbon - 12 weight 0,012kh. When using the moles of structural elements rational scc 61 can be atoms, molecules, ions, electrons or other particles or specified groups of particles.
Candela - a light intensity in a given direction of a source which emits monochromatic radiation of frequency 540 Hz December 10, energy intensity which in this direction is 1/683 W / cr.
Mechanical waves and their characteristics Consider elastic medium, which exist between particles interaction forces Body, which fluctuates ...
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